Due to the fact that attachment urls now expire (or will in a few weeks, even if you have temporarily opted out), you cannot use the url of an attachment to include that attachment in Page Designer.
There are some workarounds:
- Store the attachment somewhere else. For example the free level of Cloudinary may work for you. If you use a different cloud storage program, such as AWS that can also work as long as the url is publicly accessible.
- Link the record with the attachment to every record that you want to use in Page Designer. This might mean that you need to have the record with the attachment linked to every record in the actual table of data. Then have a lookup field in the actual table that looks up the attachment. You can then place the lookup attachment in Page Designer.